(19)
(11) EP 0 414 129 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.02.1993 Bulletin 1993/08

(43) Date of publication A2:
27.02.1991 Bulletin 1991/09

(21) Application number: 90115693.5

(22) Date of filing: 16.08.1990
(51) International Patent Classification (IPC)5: H02K 1/30, H02K 1/28, H02K 1/26, H02K 15/02, H02K 17/42
(84) Designated Contracting States:
DE FR SE

(30) Priority: 16.08.1989 JP 210079/89

(71) Applicants:
  • HITACHI, LTD.
    Chiyoda-ku, Tokyo 101 (JP)
  • THE KANSAI ELECTRIC POWER CO., INC.
    Osaka-shi, Osaka 530 (JP)

(72) Inventors:
  • Tsuji, Eiji
    Hitachi-shi (JP)
  • Nagura, Osamu
    Katsuta-shi (JP)
  • Kayukawa, Shigehiro
    Hitachi-shi (JP)
  • Yasaka, Yasuhiro
    Hitachi-shi (JP)
  • Hagiya, Koshi
    Hitachi-shi (JP)
  • Hakuta, Shinsaku
    Hitachi-shi (JP)
  • Kita, Eizo
    Kyoto-shi (JP)
  • Nakagawa, Hiroto
    Shimamotocho, Mishima-gun, Osaka (JP)
  • Oono, Yasuteru
    Kobe-shi (JP)
  • Kuzusaka, Satoshi
    Osaka-shi (JP)

(74) Representative: Patentanwälte Beetz - Timpe - Siegfried Schmitt-Fumian - Mayr 
Steinsdorfstrasse 10
80538 München
80538 München (DE)


(56) References cited: : 
   
       


    (54) Electric rotary machine, method for producing the same and hydro-electric power installation with the machine


    (57) An electric rotating machine including a rotor (50) having a spider arm (1) which is fixedly mounted on a substantially vertical shaft (11) and has arms (14) ex­tending radially outwardly from the shaft (11), and an annular rotor rim (2) fixedly mounted on distal ends of the arms (14) of the spider arm (1). The laminated core (3) is fixedly mounted on an outer periphery of the rotor rim (2), and is composed of a plurality of fan-shaped thin core plates (31) of steel laminated and arranged in an an­nular shape. Slot grooves (32) are formed in an outer pe­riphery of the core plates. The rotor rim (2) is composed of laminated rim members (21) each made of an annular thick steel plate, and rim engaging grooves are formed in an outer periphery of the rim member at equal intervals. The core plate has core engaging grooves (33) opposed to the rim engaging grooves (26), respectively, in such a manner that the number of complete core engaging grooves is two. An axially-extending connecting key (8) is fitted in each mating pair of core engaging groove and rim en­gaging groove to fix the laminated core (3) to the rotor rim (2).







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